초록 ▼

A cascade refrigeration system wherein the inlet and outlet pressures and the power consumption of the compressor of the higher temperature refrigeration circuit, and the inlet and outlet pressures and the power consumption of the compressor of the lower temperature refrigeration circuit are ascerta

A cascade refrigeration system wherein the inlet and outlet pressures and the power consumption of the compressor of the higher temperature refrigeration circuit, and the inlet and outlet pressures and the power consumption of the compressor of the lower temperature refrigeration circuit are ascertained and used to calculate more efficient operating pressures, and the operation of the compressors is adjusted to adjust the pressures of the incoming refrigerants to the cascade heat exchanger toward the more efficient operating pressures.

대표청구항 ▼

A cascade refrigeration system wherein the inlet and outlet pressures and the power consumption of the compressor of the higher temperature refrigeration circuit, and the inlet and outlet pressures and the power consumption of the compressor of the lower temperature refrigeration circuit are ascerta

A cascade refrigeration system wherein the inlet and outlet pressures and the power consumption of the compressor of the higher temperature refrigeration circuit, and the inlet and outlet pressures and the power consumption of the compressor of the lower temperature refrigeration circuit are ascertained and used to calculate more efficient operating pressures, and the operation of the compressors is adjusted to adjust the pressures of the incoming refrigerants to the cascade heat exchanger toward the more efficient operating pressures. it having a compressor, an evaporator, capillaries, and said cascade heat exchange in common with said high stage, wherein said low stage comprises a refrigerant mixture of hydrofluorocarbon refrigerant added to refrigerant R508b. 15. The system of claim 14, wherein said hydrofluorocarbon refrigerants are any of the group consisting of R134a and R404a. 16. The refrigeration system of claim 15, further comprising an oil separator in said low stage of said two-stage cascade refrigeration system. 17. The refrigeration system of claim 15, wherein said refrigerants R508b and R134a are present in said low stage of said two-stage cascade refrigeration system at approximately 90% and 10% ratios, respectively. 18. The refrigeration system of claim 15, wherein said refrigerants R508b and R404a are present in said low stage of said two-stage cascade refrigeration system at approximately 90% and 10% ratios, respectively. 19. The refrigeration system of claim 15, wherein said refrigerant mixture comprises at least 10% but not more than 16% of refrigerant R404a by volume. 20. The refrigeration system of claim 15, wherein said refrigerant mixture comprises at least 10% but not more than 16% of refrigerant R134a by volume.